My list of degooglifying actions (mostly from my older post [1])
* switch default search engine to DuckDuckGo (one can still use the !s bang when one wants to see what Google has)
* use tracking blockers (uBlock origin, BlockBear on iOS)
* use anonymous/private/porn mode browsing most of the time (except for sites I actually want to be logged in permanently)
* use Zoho as a replacement for shared Google docs
* use Youtube either in private window, and/or download content once with youtube-dl
* use Apple Maps or OpenStreetMaps instead of Google maps, though still revert to Google maps sometimes, lamentably. It's good. (I never log in, though.)
* long ago switched to different email for main email, and forwarded gmail account to it (and now, basically nobody emails to my old gmail address anymore). (In fact, I use a catch-all domain now (very easy to set up), and a fresh email for basically every account. Quite handy.)
* for contacts, photos, etc. I use Apple's built-in stuff. I do trust Apple a bit more (different business model; look at recent iPhone prices.)
* Signal, Wire, iMessage for messaging
All in all, I think a fairly degooglified life is eminently possible.
In response, people furthermore suggested:
* Firefox with Multi-Account Container function to separate browsing, or just a temporary session with `firefox -no-remote -profile $(mktemp -d)`
* Lineage OS for Android phones (though somewhat controversial)
[1] https://news.ycombinator.com/item?id=19057709